Veterinary surgical instrument



(No Model.)

I. N. WO ODLE. VETERINARY SURGIQAL INSTRUMENT.

No. 405,642." Patented June 18, 1889.

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UNITED STATES P TENT OFFICE.

ISAAC N. VVOODLE, OF ALBANY, OREGON.

VETERINARY SURGICAL INSTRUMENT.

SPECIFICATION forming part of Letters Patent No. 405,642, dated June 18,1889. Application filed May 1, 1889. Serial No. 309,219. (No model.)

To all whom it may concern:

Be it known that I, ISAAC N. WVOODLE, of Albany, in the county of Linnand State of Oregon, have invented certain new and useful Improvementsin Veterinary Surgical Instruments; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form part of this specification, in which- Figure1 is a side view of an improved castrating-shears; Fig. 2, a similarview of the opposite side thereof; Fig. 3, a sectional view on line a:00, Fig. 1. Figs. 4., 5, and 6 are details. Fig. 7 is a detail View ofthe manner of attaching the spring to the blade.

This invention is an improvement in instruments for gelding animals; andit consists in providing a shears with an adjustable springcontrolledcrushingjaw, whereby the animal ligat'ures and tissues are mashedsimultaneously with the cutting, and hemorrhage and bleeding preventedwithout the use. of a cautery.

Referring by letters to the drawings, A and B designate the handle ofthe shears, which are pivotally united by a bolt and nut a, said bolthaving a cylindrical portion near its head, on which is pivoted handleB, and near its end an angular portion engaging an angular opening inhandle A, as shown in the drawings. Handle B has a curved jaw 0,provided with a series of coarse serrations c on its inner edge.

D designates a blade having an angular shank d engaging an angularshoulder on handle A and perforated for the passage of bolt a, andsecured additionally to the handle by a rivet or screw E, as shown. Theinner edge of blade D is curved similarly but oppositely to jaw O, andis finely serrated on its inner edge e, which forms the cutting-edge ofthe tool.

F designates a metal segment curved on its upper edge similarly to thecurvature of edge e of the blade and coarsely serrated on this edge, asat f.

G G are two inclined and slotted lugs depending from segment F, by whichthe segment is attached to the inner face of blade D by the assistanceof two screw pins H I-I,which pass through the slots in lugs G G, andare so arranged that when the segment is lifted or forced upward untilthe pins are at the bot tom of the slots the serrated edge of thesegment will preferably stand above the edge e of the blade. The slotsin lugs G are curved downward and forwardly, so that as the segment isdepressed it will move slightly forward and downward and is permitted aslight rocking movement.

J designates a flat curved spring-bar attaohed at one end to the innerside and near the lower edge of blade D by a screw K, and is kept fromturning by a projection j on its side, near its fixed end, which engagesa corresponding recess kin the blade. The other end of the bar is bent,substantially as shown, so that its extremity bears against the undersurface of segment F, preferably on a dressed lug f, as shown, so thatnormally the spring forces segment F upward.

The handles AB are provided with inwardly-standing pins L l,respectively, said pins being beveled on their adjoining faces andoverlapping as the handles are closed; and M is a coiled spring attachedto the handles over said pins, and adapted to keep the shears open.

m is a hook pivoted on one handle and arranged to engage a pin on theopposite handle to lock-the shears when closed.

In operation, the ligaments to be severed are caught between the openjaws of the shears, then by firmly closing the handles the ligaments arefirmly caught between the segment and jaw O and simultaneously severedby edge e, and the coarse serrations of the jaw and segment mash theflesh sufficiently to stop' any effusion of blood. As the segment isyielding, there is less danger of the ligaments being so crushed thatthey will break and admit bleed ing, and the rocking motion permittedthe segment insures an equal crushing on the tissues across the entirecut. The segment and spring can be readily removed for cleaning orrepairing.

Having shown and described my invention, what I claim is- 1. Thecombination of the handles, curved serrated jaw, and cutting blade, withthe spring-controlled and serrated segment, substantially as described.

2. The combination of the shears, con structed substantially asdescribed, with a curved serrated rocking segment mounted on thecutting-blade of the shears having downwardly and forwardly inclinedslotted lugs and engaging serrations in the jaw thereof, substantiallyas described.

3. The combination of the handles, beveled pins and spring thereon, theserrated jaw and cutting-blade, with the serrated rocking segmentmounted on said blade, and the spring secured to said blade and engagingthe segment, substantially as and for the purpose described. l

4. The combination of the handles, serrated jaw, the curved and serratedcutting-blade attached to one of said handles, the serrated rockingsegment and its slotted lugs, the pins attaching said segment to theblade, and the spring engaging said segment, substantially as and forthe purpose described.

5. The combination of the handles A B, the beveled pins L Z, and springM, the curved serrated jaw C, and the cutting-blade D, with the serratedsegment'F, having depending slotted lugs G G, the pins engaging saidslots and securing the segment to the blade, and the spring J, allsubstantially as and for the purpose described.

In testimony that I claim the foregoing'as my own I affix my signaturein presence of two witnesses.

. ISAAC N. WOODLE. \Vit-nesses:

L. II. MONTAUGE, O. O. KELLY.

